DENTAL FORMULA IN MAMMALS

Written by Sunday, 02 July 2017 16:37
Mostly the number of teeth is fixed in each mammalian species. Mammalian heterodont dentition is expressed by a ‘dental formula’. The number and arrangement of teeth in each half of…

SKIN OF MAMMALS (RABBIT)

Written by Sunday, 02 July 2017 15:39
SKIN STRUCTURE AND FUNCTIONS IN MAMMALS The body of Rabbit is covered by skin. It shows two layers,   Epidermis Dermis   Associated with skin are hair, claw and glands.…

STERNUM OF RABBIT

Written by Sunday, 02 July 2017 15:31
In the mid ventral region of thorax of Rabbit sternum is present. It is made by five bony pieces called "Sternabrae". It is called "mesosternum". This will show "presternum" anteriorly.…

ORGAN OF CORTI OR COCHLEA

Written by Sunday, 02 July 2017 08:08
The internal ear of rabbit includes "organ of corti" or Cochlea spirally coiled. Lagena is enclosed and fused with the spirally coiled j the preotic bone which form cochlea. Cochlea…

CLASSIFICATION OF MAMMALS: THERIA

Written by Sunday, 02 July 2017 01:19
THERIA   This group includes Mammals which show true mammals characters Infraclass Metatheria:   They show almost all the Mammalian characters.   Females show brood pouch or Marsupium on their…

CLASSIFICATION OF MAMMALS: PROTOTHERIA

Written by Sunday, 02 July 2017 01:06
Mammalia is divided into two subclasses. 1) Prototheria 2) Theria   GENERAL CHARECTERS OF PROTHERIA   External pinnae are absent. In the young stage teeth are present and in the…

GENERAL CHARECTERS OF MAMMALS

Written by Saturday, 01 July 2017 23:57
Mammal like Reptiles therapsida might have given Mammals. It occured at the end of Triassic period of Mesozoic era. In Jurassic period only few mammals existed. In the coenozoic era…

PECTEN IN BIRDS

Written by Saturday, 01 July 2017 23:45
In the eye of the bird a comb like structure is present. It is called pecten. It is soft and vascular. It is a rectangular plate. It projects into the…

SYNSACRUM IN BIRDS

Written by Saturday, 01 July 2017 23:29
In the birds vertebral column compound structure is present. It is called Synsacrum. It is formed by the fusion of 14 to 16 vertebrae. Those vertebrae are one last thorasic…

BODY WALL OF BIRDS (AVES)

Written by Saturday, 01 July 2017 19:50
The body wall of birds has three regions, Skin, Muscles and Perito­neum.   The skin is dry. It shows upper stratum corneum, which has flat cornified cells. The feathers cover…
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